King Aethelred, often referred to as Aethelred the Unready, was the King of England from 978 to 1016. He faced numerous challenges during his reign, including Viking invasions and internal strife. His nickname, "Unready," comes from the Old English word "unræd," meaning ill-advised or poorly prepared, reflecting his struggles in leadership. Aethelred's reign was marked by attempts to buy peace with the Vikings, which ultimately proved ineffective. He implemented various military reforms and sought alliances, but his efforts were often undermined by political instability and betrayal. Aethelred's reign ended with his death in 1016, after which Cnut the Great became king.